231221122 has 16 divisors (see below), whose sum is σ = 380777472. Its totient is φ = 104429520.

The previous prime is 231221119. The next prime is 231221129. The reversal of 231221122 is 221122132.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 231221096 and 231221105.

It is not an unprimeable number, because it can be changed into a prime (231221129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30018 + ... + 36925.

It is an arithmetic number, because the mean of its divisors is an integer number (23798592).

Almost surely, 2^231221122 is an apocalyptic number.

231221122 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

231221122 is a deficient number, since it is larger than the sum of its proper divisors (149556350).

231221122 is a wasteful number, since it uses less digits than its factorization.

231221122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67113.

The product of its digits is 96, while the sum is 16.

The square root of 231221122 is about 15205.9567933097. The cubic root of 231221122 is about 613.7749620055.

Adding to 231221122 its reverse (221122132), we get a palindrome (452343254).

The spelling of 231221122 in words is "two hundred thirty-one million, two hundred twenty-one thousand, one hundred twenty-two".